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X‐ray diffraction and magnetization studies of BiFeO 3 multiferroic compounds substituted by Sm 3+ , Gd 3+ , Ca 2+
Author(s) -
AlHaj Mansour
Publication year - 2010
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200900550
Subject(s) - magnetization , multiferroics , coercivity , analytical chemistry (journal) , materials science , impurity , crystallography , chemistry , x ray crystallography , magnetic hysteresis , ferroelectricity , diffraction , condensed matter physics , magnetic field , physics , dielectric , optoelectronics , organic chemistry , chromatography , quantum mechanics , optics
The multiferroic compounds Bi 0.9 Sm 0.1 FeO 3 , Bi 0.9 Gd 0.1 FeO 3 , Bi 0.9 Ca 0.1 FeO 3 , Bi 0.9 Sm 0.05 Ca 0.05 FeO 3 , and Bi 0.9 Gd 0.05 Ca 0.05 FeO 3 were prepared by the conventional ceramic method and were characterized by X‐ray diffraction, vibrating sample magnetometry, and differential scanning calorimetry. The compounds were found to have the rhombohedral perovskite‐like structure, accompanied by a small residual Bi 2 Fe 4 O 9 impurity phase. Magnetic hysteresis loops with enhanced remnant magnetization and coercive field were obtained for the Gd‐containing compounds. The improvement of magnetic behavior of the Gd‐containing compounds is thought to arise mainly from the partial suppression of the spiral spin structure and the stronger interaction between magnetic ions. The magnetic transition temperatures of the compounds were found to be in the range 300‐310 °C. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)